ReviewsSubtraktion. By Des PlantesB. G. Ziedses, pp. 71 with 59 illus., 1961 (Stuttgart, Georg Thieme), DM. 28.
Gabriella Spiegler · British Journal of Radiology · 1962
This book deals with a process of extracting the maximum information from a particular type of radiography. The principle of the author's method, termed “subtraktion”, is as follows. Supposing two radiographs of the same object are taken under identical conditions, and a positive transparency is made of one. If now one looks, or prints, through the superimposed positive transparency and one of the radiographs, an even background blackening is obtained showing no detail.